Dictionary.com
Thesaurus.com

dia-

1 American  
  1. a prefix occurring in loanwords from Greek (diabetes; dialect ) and used, in the formation of compound words, to mean “passing through” (diathermy ), “thoroughly,” “completely” (diagnosis ), “going apart” (dialysis ), and “opposed in moment” (diamagnetism ).


dia. 2 American  

abbreviation

  1. diameter.


dia- British  

prefix

  1. through, throughout, or during

    diachronic

  2. across

    diactinic

  3. apart

    diacritic

  4. (in botany) at right angles

    diatropism

  5. in opposite or different directions

    diamagnetism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

dia– Scientific  
  1. A prefix meaning “through” or “across,” as in diameter, the length of a line going through a circle.


Etymology

Origin of dia-

< Greek, combining form representing diá (preposition) through, between, across, by, of, akin to dýo two and di- di- 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

With a DIA, the individual pays one or more premiums to an insurer in exchange for guaranteed income payments that begin at a future date.

From The Wall Street Journal

Suzy’s pick: Ela Minus, “Día” Born in Bogotá, Colombia, and now based in Brooklyn, electronic artist-producer Gabriela Jimeno, or Ela Minus, first bonded with beats as a tween drummer in a hardcore band.

From Los Angeles Times

That rugged punk rock intensity would later unify the vast, synth-laden sprawl that is her second album, “Día”: a chronicle of her displacement during the COVID-19 pandemic and subsequent ego death.

From Los Angeles Times

The horns and tambora spill into the street as the neighborhood celebrates early Día de los Muertos festivities.

From Los Angeles Times

The track honors his late grandpa for Día de los Muertos and tends to go viral each year around the holiday.

From Los Angeles Times